> But I've never gone to someone's house and seen their bathroom in that condition.
I broadly agree with your premise, but the nitpicky HN part of my brain feels obligated to point out that a certain amount of selection bias might be at play here. Public bathrooms are by definition places the entire spectrum of the public visits, and is probably a broader and slightly more diverse pool than the people whose homes you personally visit (unless you're a social worker, which you probably aren't because then you would absolutely have seen swathes of homes that a lot of people here would probably deem uninhabitable)
That said, you're not wrong : we've all witnessed friends, acquaintances et al behave differently from one context to another. I live in Norway, and the prototypical example that comes to mind is that kids / young adults here are significantly more belligerent and antisocial abroad than at home where they are subject to the Scandinavian brand of tut-tut judgyness. Basically the spring break phenomenon so it's not unique by any means.